LINPACK is a software library used for performing numerical linear algebra computations. It provides routines for solving systems of linear equations, linear least squares problems, and eigenvalue problems. Developed in the 1970s, it has become a standard tool in scientific computing. The library is particularly known for its efficiency and accuracy, making it a popular choice in various applications, including engineering and physics. LINPACK is often used in conjunction with high-performance computing systems, and its performance is a key factor in ranking supercomputers through the TOP500 list.